Machine for trimming stereotypes.



A. EGLI.

MACHINE FOR TRIMMING STEREOTYPES.

APPLICATION FILED MAR. 18. 1.9]5. L1 1 1 Patented Apr. 18, 1916.

2 SHEETS-SHEET l- MMnesses'.

THE COLUMBIA PLANOGRXPH Co., WASHINGTON, D. c

iimssea:

A. EGLI.

MACHINE FOR TRIMMING STEREOTYPES. APPLICATION FILED MAR-18.1915.

1 1 1 1 I Patented Apr. 18, 1916.

2 SHEETSSHEET 2- J4 am THE COLUMBIA PLANOGRAPH co., WASHINGTON. u. c.

v. @TATEd PATENT UTTTW,

ARNOLD EGLI, OF AUGSBURG, GERMANY, ASSIGNOR T MASCI-IINENFABRIKAUGSBURG- NTTRNBERG, AKTIENGESELLSCHAFT, OF AUGSBURG, GERMANY, ACORPORATION OF GERMANY.

Specification of Letters Patent.

MACHINE FOR TRIMIVIING STEREOTYPES.

Patented Apr. 18, T916.

Application filed. March 18, 1915. Serial No. 15,392.

To aZZ whom it may concern Be it known that I, ARNOLD EGLI, a citizen ofthe Swiss Confederation, and residing at Augsburg, Germany, haveinvented certain new and useful Improvements in Machines for TrimmingStereotypes, of which the following is a specification.

This invention relates to machines for trimming stereotypes.

In known machines of the type in question the dead head of the plate isout olf by a milling cutter rotating about its own axis. The metal cutaway by the rapidly rotating cutter is almost as fine as dust and isthrown away from the tool. This metallic dust flies about in the air,penetrates into bearings and other readily injured parts of machines andcauses trouble. Further, the fine particles flying about in the air area great annoyance to the mechanics in charge of the machines. Also, ahigh percentage of valuable metal is lost.

A primary object of this invention is to provide an improved machine fortrimming stereotype plates to which these defects are not attached.

To this end, in the improved machine according to the invention the deadhead is removed not as described above by a cutter rotating about itsaxis, but by one or more edging tools such as are used in well-knownmanner in tooling iron, brass and other materials. The edging tools arepreferably carried by a tool carrier which rotates about the stereotype.\Vhen this mode of removing superfluous metal is adopted the waste metalhas the form of long shavings which can be caught in a box. Further, ascompared with the milling cutters used heretofore the tools employed inthe improved machine according to the invention have the advantage thatthe work proceeds almost noiselessly, whereas the high-speed millingcutter causes a very loud noise which is very disagreeable, particularlyat night.

The tool carrier in the improved machine is preferably provided with twodifferent kinds of tools, the one being adapted for cutting olf the deadhead, and the other for making faces of exactly predetermined shape.

To these ends the invention consists in the construction, arrangementand combination of parts described hereinafter and pointed out in theclaims.

One illustrative embodiment of the invention is diagrammaticallyrepresented by way of example in the accompanying drawings, whereinFigure 1 is an elevation, partly in section, showing a preferred form ofthe improved machine, part being shown broken away, and Fig. 2 is avertical section through the upper part thereof; Figs. 3 and 4: areplans and elevations, respectively, showing the two different kinds ofedging tools, and Fig. 5 is an enlarged sectional view showing how thetool carrier is mounted.

Referring to the drawing, the stereotype plate a rests on the two ledgesb and 0 while it is being tooled, it being held in position during thetooling operation by the cylin drical support d (Fig. 2); thestereotyped impression is prevented in known manner from being injuredowing to a sheet 6 of zinc being placed between the support d and theplate a. The parting tools proper are designated 7, and the borderingtools 9. Both kinds of tools are mounted on the rotatable carrier hwhich, in the illustrative embodiment, has a toothed external periphery,is mounted in the manner described hereinafter and is driven by thechain 2'. The tools f and g are inserted into radial slots is in thecarrier h and are prevented from shifting axially by the disk Z. Eachtool has a lug m which takes into a groove 7 in the disk Z. In thismanner the tools are also prevented from unintentionally shiftingradially. The disk Z in turn, is prevented from shifting axially by thedisk 0 which is securely fastened by the screws 10 to the carrier 72,.

The carrier h and the disk Z do not rotate at the same speed; on thecontrary,the diskZ is driven by the carrier h or by the disk 0 throughthe intermediary of a gear-wheel Q in such manner that it movesrelatively to the disks h and 0. The arrangement may suitably be suchthat the disk Z rotates 321 times while the members it and 0 rotate 320times. The disk Z therefore rotates relatively to the tools f and Thelugs 'm, of the tools slide in the cam-ways n in the disk Z. During thetooling operation the tools are therefore slowly driven radially forwarduntil the dead head is completely separated and the tooling of the facesis finished; on the termination of this operation they are slowlyreturned into their initial position owing to the action of the cam-wayon the lugs m. For example, if the tool carrier rotates 40 times untilthe plate is completely tooled, and if there is the above mentionedratio of transmission 3212820 between the disks 1 and 0, then the disk ZWill rotate 1; revolution relatively to the tool carrier during thetooling of a plate. Accordingly, during the first 20 revolutions of thetool carrier the tools are fed forward and during the second 20revolutions returned into their normal position when the cam-way has theshape shown in the drawing. The drawing shows the tools in their lowestposition at the moment when the head has been completely separated fromthe plate.

The rotatable tool carrier is adjustably mounted on the fixed frame (Zof the machine by means of ball-bearings 1 provided.

in the recesses s in the disk 72,. Fig. 5 shows one of the bearings onan enlarged scale. Rigidly secured to the disk It are eccentric pins 12which are carried by ball-bearings r. The ball-bearings are held inposition by plates g which are securely held on the disk With the frameor support d or is rigidly cylindrically curved plates,

it by the screws 2-. The outer periphery of each of the outer rings 25of the ball-bearings runs on the cylindrical periphery of the stationarymember u which is integral connected therewith. By turning the eccentricpins 4) the rings 2? can be readily adjusted. After the ball-bearings rhave been correctly adjusted the tool carrier will run exactlyconcentrically with the plate a.

After the separation of the dead head is complete, thus in the presentcase after 20 revolutions of the tool carrier, the boring tool 40operates and bores out the inside of the plate. This tool rotates oncewhile the tool carrier it rotates 40 times. inside of the plate is beingbored out the tool carrier it runs light, the edging tools f and 9 beingreturned into their normal position during this time. The inside of theplate is tooled only after the complete separation of the dead head 00because otherwise the heavy dead head would load one end of the plateduring the boring operation andv the plate might not bear evenly againstits support while the inside is being tooled.

I claim 1. In a machine for trimming curved plates, the combination witha support for a plate, of a tool carrier rotatably mounted on thesupport, and severing tools carried by the tool carrier for cutting theplate in two, bordering tools slidably carried by the tool carrier fortrimming the cut off edge of the plate, and means for radially advancingand retracting the cutting edge of the tools during the rotation of saidcarrier.

2.. In a machine for cutting and trimming the combination WVhile thewith a cylindrical support for a plate, of a tool carrier rotatablymounted on the support, severing tools slidably carried by the toolcarrier for cutting the plate, and bordering tools slidably carried bythe tool carrier for trimming the cut off edge.

3. In a machine for trimming cylindrically curved plates, thecombination with a rigid support for a plate, of a tool carrierrotatably mounted on the support, and severing knife tools slidablycarried by the tool carrier and adapted to sever the plate, a boringtool adapted to shave the inner side of the plate mounted rotatably andconcentrically with the said tool carrier and gearing connection betweensaid tool carrier and said boring tool whereby said boring tool is madeto operate during half a revolution after the severing tools havecompleted their work.

4-. In a machine for trimming cylindricallv curved plates, thecombination with a fixed cylindrical support for a plate, of a toolcarrier rotatably mounted on the support, and severing tools slidablycarried by the tool carrier and adapted to sever the plate and a boringtool adapted to shave the inner side of the plate mounted rotatably andconcentrically with the said tool carrier and connected in such a mannerwith the tool carrier that it is brought in working position in a halfrevolution while the tools sever the plate and begins to work when thesevering operation is finished.

In a machine for trimming cylindrically curved plates, the combinationwith a cylindrical support for a plate, of a rotatable tool carriermounted on the support, means for relative adjustment between thecarrier and the support comprising eccentric bolts having antifrictionbearings and a clamping device for the bolts, and edging tools slidablycarried by the tool carrier and adapted to tool the curved edge of theplate.

6. In a machine for trimming semicylindrical stereotype plates having adead head on the curved edge thereof, the combination with a cylindricalsupport for a plate, of a radially slotted tool carrier rotatablymounted on the support, a disk rotatably mounted on and geared to thetool carrier, said disk being provided with a cam-way of polygonalshape, and tools inserted into the slots in the tool carrier, each toolhaving a lug taking into the can -way, whereby the tools will beautomatically advanced and retracted in radial direction during therotation of said carrier.

7. In a machine for trimming semicylindrical stereotype plates having adead head on the curved edge thereof, the combination with a cylindricalsupport for a plate, of a circular tool carrier, a plurality ofeccentric pins carried .by the latter, each pin. carrying. aball-bearing comprising an outer ring adapted to run on a cylindricalouter face of the support, and radially disposed edging tools carried bythe tool carrier.

8. In a machine for trimming semicylindrical stereotype plates having adead head on the curved edge thereof, the combination of a cylindricalsupport, a radially slotted tool carrier adjustably mounted thereon, adisk having a cam-way rotatable on the tool carrier, gearing having asmall ratio of transmission operatively connecting the tool carrier withsaid disk, parting tools and bordering tools mounted in the slots in thetool carrier, each tool having a projection taking into the cam-way.

9. In a machine for trimming cylindrically curved plates, a fixedsupport for the plate, an arbor revolubly mounted in said support, aboring tool on said arbor, an annular carrier having a radial recess, aknife tool slidably mounted in said recess and provided with atransverse lug, a cam ring having a straight tangential cam grooveengaging with said lug, said arbor, carrier and cam ring beingconcentrically mounted on said support and provided with positivedriving connection, whereby said lug and cam groove will cooperate toadvance said knife tool to do its cutting While said boring tool runsidle, and thereupon retract the knife tool while the boring tool is in oeration.

10. In a machine for trimming cylindrically curved plates, a fixedsupport for the plate, an arbor revolubly mounted in said support, aboring tool on said arbor, an annular carrier having a radial recess, aknife tool slidably mounted in said recess and provided with atransverse lug, a cam ring having a straight tangential cam grooveengaging with said lug, said arbor, carrier and cam ring beingconcentrically mounted on said support and provided with positivedriving connection, the ratio of which is such, that said lug travelsthe entire length tiopies of this patent may be obtained for five centseach, by addressing the of said cam groove while said arbor makes onerevolution.

11. In a machine for trimming cylindrically curved plates, a fixedsupport for the plate, an arbor revolubly mounted in said support, aboring tool on said arbor, an annular carrier having a radial recess, aknife tool slidably mounted in said recess and provided with atransverse lug, a cam ring having a straight tangential cam grooveengaging with said lug, said arbor, carrier and cam ring beingconcentrically mounted on said support and provided with positivedriving connection, the ratio of which is such, that said lug travelsthe entire length of said cam groove while said arbor makes onerevolution thereby advancing and retracting the knife tool once whilesaid boring tool respectively runs idle and does its work.

12. In a machine for trimming cylindrically curved plates, a fixedsupport for the plate, an arbor revolubly mounted in said support, aboring tool on said arbor, an annular carrier having eight radialrecesses, a knife tool slidably mounted in each of said recesses andprovided with a transverse lug, a cam ring having a continuous camgroove in the shape of an octagon in which all of said tool lugs engage,said arbor, carrier and cam ring being concentrically mounted on saidsupport and provided with positive driving connection, the ratio ofwhich is such that said boring tool makes one half revolution while theeight knife tools are simultaneously advanced by said lugs and camgroove, and the boring tool makes another half revolution while theeight knife tools are similarly retracted.

In testimony whereof, I ailiX my signature in the presence of twowitnesses.

ARNOLD EGLI.

Witnesses:

C. O. SPINGELBERG, Vroron Gneennnnnonn.

Commissioner of IPatents,

Washington, I). G.

